Surface cleaning device

Abstract

Disclosed in the present invention is a surface cleaning device, comprising a floor brush, wherein the floor brush is provided with a roller brush, a dirt scraping member, and a comb tooth member with comb teeth; each of the comb tooth member and the dirt scraping member abuts against the roller brush; the comb tooth member comprises a combing face abutting against the roller brush, and the combing face comprises a first end, and a second end located between the dirt scraping member and the first end; and the amount of deformation of the dirt scraping member abutting against the roller brush is greater than the amount of deformation of each of the first end and the second end abutting against the roller brush, and the amount of deformation of the second end abutting against the roller brush is less than the amount of deformation of the first end abutting against the roller brush, such that an entangled object releases pressure at the second end and is stripped by the dirt scraping member.

Description

Surface cleaning device

[0001] This application claims priority to the following Chinese patent applications, the entire contents of which are incorporated herein by reference:

[0002] Submitted to the China Patent Office on September 8, 2023, application number 2023111624722, invention titled "A surface cleaning device for peelable windings";

[0003] The utility model application, filed with the China Patent Office on September 8, 2023, is numbered 202322452239X and is titled “Cleaning component and surface cleaning machine for easy removal of entanglements”;

[0004] The application was filed with the Chinese Patent Office on September 8, 2023, with application number 2023111613319 and the title of the invention being “A surface cleaning device with good decontamination effect”;

[0005] Submitted to the China Patent Office on September 8, 2023, application number 2023224519560, the utility model name is "A surface cleaning device with good cleaning effect";

[0006] The application, filed with the Chinese Patent Office on September 8, 2023, is numbered 2023111625068 and titled "A surface cleaning device with good dirt suction effect";

[0007] Submitted to the China Patent Office on September 8, 2023, application number 2023224532851, and the invention name is "A surface cleaning device with comb teeth." Technical Field

[0008] The invention belongs to the technical field of cleaning appliances, and specifically provides a surface cleaning device. Background Art

[0009] With the development of surface cleaning technology, surface cleaning equipment has gradually become a common household appliance for cleaning floors. Surface cleaning equipment typically consists of a main body and a floor brush. The floor brush is equipped with a roller brush as a cleaning element, which cleans the floor through friction. During the cleaning process, a scraping element is needed to simultaneously scrape away dirty water and adhering dirt. Foreign matter such as hair and lint can easily become entangled on the surface of the cleaning element. To remove foreign matter entangled in the roller brush, some floor brushes are equipped with comb teeth to scrape off foreign matter.

[0010] For example, the prior art with application number CN201711481216.4 discloses a comb tooth structure, in which the comb teeth extend into the roller brush and are provided with a leading edge at a certain angle to the roller brush, through which the entanglements on the rotating roller brush are removed. On the one hand, because the roller brush rotates at a relatively fast speed, some entanglements may not be removed by the comb teeth immediately because they are too tightly attached to the outer surface of the roller brush, causing the entanglements to continue to rotate under the drive of the roller brush. Once the entanglements pass over the comb teeth and wrap around the roller brush for a circle, it is difficult to remove the entanglements from the surface of the roller brush, and these entanglements will become tighter and tighter, which not only affects the subsequent cleaning effect of the roller brush, but also requires the user to manually clean the entanglements, which is inconvenient to use. On the other hand, the extension line of the leading edge of the comb teeth is close to the rotation center line of the roller brush, which makes the rotation resistance of the comb teeth to the roller brush relatively large, affecting the life of the drive motor of the roller brush.

[0011] Summary of the Invention

[0012] The present invention aims to provide a surface cleaning device that at least partially addresses the aforementioned technical issues. The present invention primarily utilizes the existing comb teeth for first-stage stripping of entangled objects by adding a scraping element that abuts the comb teeth. The two elements cooperate to form a second-stage stripping mechanism, allowing entangled objects that were not removed by the first-stage stripping mechanism to be scraped off by the second-stage stripping mechanism, thereby improving the stripping effect.

[0013] The present invention provides a surface cleaning device, including a floor brush, wherein the floor brush is provided with a roller brush, a scraping member and a comb member with multiple comb teeth, the comb member and the scraping member both abut against the roller brush, the comb member includes a combing surface abutting against the roller brush, the combing surface includes a first end and a second end located between the scraping member and the first end, the deformation amount of the scraping member abutting against the roller brush is greater than the deformation amount of the first end and the second end abutting against the roller brush, and the deformation amount of the second end abutting against the roller brush is smaller than the deformation amount of the first end abutting against the roller brush, so that the entangled object releases the pressure at the second end and is peeled off by the scraping member.

[0014] Furthermore, tooth grooves are provided between adjacent comb teeth, and the tooth grooves extend to the lower surface of the scraping member. The comb teeth include front tooth surfaces that abut against the roller brush, and the front tooth surfaces of the comb teeth form the combing surface.

[0015] Furthermore, the comb tooth part includes a connecting portion extending from the comb teeth to the lower surface of the scraping part, the connecting portion has a drainage surface, the comb teeth include a front tooth surface abutting the roller brush, and the drainage surface of the connecting portion and the front tooth surface of the comb teeth together form the combing surface.

[0016] Furthermore, the front tooth surface forms the first end, and the drainage surface forms the second end.

[0017] Furthermore, the combing surface extends obliquely toward the roller brush, and the roller brush includes a roller shaft and a cleaning member. The combing surface and its extended surface are separated from the outer surface of the roller shaft.

[0018] Furthermore, the surface cleaning device also includes a suction fan, and the floor brush is also provided with a suction port connected to the suction fan. The scraping member and comb teeth are arranged above the suction port in sequence from top to bottom, and the comb teeth extend downward to at least partially cover the suction port.

[0019] Furthermore, the comb teeth include through sections, and gaps are provided between the through sections to form a slit effect area between the sewage suction port and the roller brush.

[0020] Furthermore, the comb teeth are not higher than the sewage suction port, the through section is arranged at the lower part of the comb teeth, and there is a distance between the tooth grooves between the comb teeth and the bottom surface of the scraping member.

[0021] Furthermore, the floor brush is also provided with a floor scraping strip that contacts the surface to be cleaned, and a suction nozzle is formed between the floor scraping strip and the roller brush. The comb tooth part is provided on the top wall of the suction nozzle, and the comb tooth part is provided with a guide portion toward the suction nozzle. The rear tooth surface is inclined toward the direction of the suction nozzle and at least partially forms the guide portion.

[0022] In a surface cleaning device using the technical solution of the present invention, when the roller brush rotates, the cleaning element first contacts the first end of the combing surface. As the first end passes, the tips of the comb teeth can first peel off most of the hair entanglements on the cleaning element, thereby achieving first-level peeling. During this process, a small amount of entanglements may not be peeled off in the first stage and may pass over the first end and pass through the second end. As the pressure against the roller brush bristles at the second end decreases, the deformation of the bristles decreases, and the pressure on the entanglements is released, causing the entanglements to become loose or detached from the roller brush. In particular, the front end of the entanglements will break away from the bristles and continue to move upward with the roller brush to the scraping element. Because the deformation of the scraping element against the roller brush is greater than that of the first and second ends, the scraping element deeply squeezes and scrapes the roller brush. The scraping element begins to block and peel from the front end of the entanglements, preventing the entanglements from passing over the scraping element, thereby achieving second-level peeling. In other words, the entanglements undergo two-stage peeling, namely, first and second-stage peeling, which can better prevent the entanglements from passing over the scraping element.

[0023] In addition, another surface cleaning device is provided, including a floor brush with a roller brush, the floor brush is provided with a decontamination device abutting the roller brush, the decontamination device includes a scraping member, a comb member located below the scraping member, the comb member is provided with a plurality of comb teeth and a connecting portion extending from the comb teeth to the lower surface of the scraping member, the connecting portion abuts against the lower surface of the scraping member, the comb teeth and the connecting portion form a combing surface, the combing surface abuts against the roller brush, the scraping member extends toward the roller brush over the combing surface, the liquid flow scraped by the scraping member gathers between the connecting portion and the lower surface of the scraping member to form a filling area, the liquid flow in the filling area gathers and pressurizes to flush the gaps between the comb teeth.

[0024] Furthermore, a guide groove is provided at the lower portion of the connecting portion, the guide groove is connected to the gaps between the comb teeth, and the combing surface of the connecting portion, the guide groove and the lower surface of the scraping member form a filling area.

[0025] Furthermore, the connecting portion is provided with a guide groove, which extends upward to the lower surface of the scraping member and downward to the gap between the comb teeth. The guide groove and the lower surface of the scraping member form a filling area.

[0026] The surface cleaning device adopts the present technical solution, after the cleaning work starts, the roller brush rotates, and the comb teeth first contact the cleaning member, peeling off the dirt, dirty liquid, hair and other entanglements on the roller brush and moving downward. Even if a small amount of dirt, dirty liquid, hair and other entanglements are not completely peeled off, their adhesion or winding relationship with the roller brush has been loosened, and they continue to move upward with the roller brush to the scraping member. The front end of the scraping member is located in front of the tooth tip, and the scraping member deeply squeezes and scrapes the roller brush, so that the dirty liquid in the roller brush is squeezed out again, and this small amount of dirt is also scraped off, and the hair entanglement is completely peeled off. The dirty liquid squeezed out again carries the peeled dirt, hair and other entanglements and flows downward along the combing surface of the comb teeth. At this time, the dirty liquid squeezed twice merges to form a larger liquid flow that continues to move downward. The gap between the combing surface of the scraping part and the lower surface of the scraping part and the roller brush is small, and this area is partially filled with bristles, so the water pressure of the liquid flow in this area increases, and the lower surface of the scraping part and the combing surface of the comb tooth part form a filling area, and the comb teeth are at least partially arranged in the filling area. The liquid flows that intersect in this area carry dirt, hair and other entangled objects into the gaps between the comb teeth and are divided into multiple liquid flows. Since the gaps between the comb teeth are small, the water pressure increases again in an instant, and the flow rate accelerates. The dirty liquid carries dirt, hair and other entangled objects and is quickly guided downward by the gaps between the comb teeth and is collected in the suction box or enters the dirt bucket through the suction port. Therefore, the decontamination effect is good, especially it will not cause hair and other entangled objects to be entangled on the roller brush, and the customer does not need to manually clean the hair and other entangled objects on the roller brush. The cleaning effect is good and the customer experience is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0028] FIG1 is a schematic diagram of a surface cleaning device according to the present invention;

[0029] FIG2 is a schematic diagram of a floor brush of the surface cleaning device;

[0030] FIG3 is a cross-sectional view of the floor brush in FIG2 along the AA direction;

[0031] FIG4 is an enlarged view of point A in FIG3 ;

[0032] Figure 5 is an exploded view of the floor brush structure;

[0033] FIG6 is a schematic diagram of a two-stage peeling state of a winding;

[0034] FIG7 is a front view of the main housing of the floor brush in FIG5 ;

[0035] FIG8 is an enlarged view of point B in FIG7;

[0036] FIG9 is a cross-sectional view taken along the CC direction in FIG8;

[0037] FIG10 is a schematic diagram of the path of airflow passing through the slit effect area between the comb teeth;

[0038] FIG11 is another embodiment of the connecting portion of the comb teeth;

[0039] FIG12 is a cross-sectional view of the floor brush structure of the surface cleaning device according to the second embodiment;

[0040] 13 is a schematic diagram of the crawler roller brush structure of Example 2;

[0041] FIG14 is an enlarged view of a partial cross-sectional structure of Example 2;

[0042] FIG15 is an enlarged view of the fitting portion of the comb member and the scraping member in FIG13;

[0043] FIG16 is a schematic diagram of another embodiment of the comb member in Example 2;

[0044] FIG17 is a cross-sectional view of the floor brush structure of the surface cleaning device according to the third embodiment;

[0045] FIG18 is an enlarged view of point D in FIG17;

[0046] FIG19 is an enlarged view of point G in FIG18 ;

[0047] FIG20 is a schematic diagram of the cross-sectional structure of the floor brush in the fourth embodiment.

[0048] Figure numerals: 1. Body; 2. Floor brush; 200. Floor brush main shell; 21. Upper shell; 22. Lower shell; 221. Front side; 222. First convex edge; 223. Second convex edge; 224. Bottom; 23. Accommodating chamber; 24. Sewage suction port; 241. Top; 25. Sewage suction hose; 26. Roller brush cover; 27. Roller brush chamber; 28. Floor scraper; 3. Clean water tank; 4. Roller brush; 40. Roller shaft; 41. Bristles; 42. Base material; 44. First rotating roller; 45. Second rotating roller; 46. Support frame; 5. Scraping member; 51. Installation section ; 52. Suspended section; 521. Front end; 6. Comb tooth part; 61. Comb teeth; 611. Through section; 612. Diversion section; 614. Diversion groove; 613. Slit effect area; 616. Front tooth surface; 617. Rear tooth surface; 6171. First inclined surface; 6172. Second inclined surface; 618. Tooth tip; 62. Connecting part; 621. Drainage surface; 64. Fixed part; 7. Sewage bucket; 8. Water distribution part; 81. Water supply port. DETAILED DESCRIPTION

[0049] Those skilled in the art should understand that the embodiments described below are merely preferred embodiments of the present application, which are merely used to explain the technical principles of the present application and are not used to limit the scope of protection of the present application.

[0050] It should be noted that in the description of this application, terms such as "center," "upper," "lower," "top," "bottom," "vertical," "horizontal," "inner," and "outer" that indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that a device or component must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0051] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0052] The cleaning device of the present application can be a dry vacuum cleaner or a wet floor scrubber / mopping device. Specifically, the cleaning device can be a handheld cleaning device with a handle and manually operated by a user, such as a handheld floor scrubber. Alternatively, the cleaning device can be a self-propelled cleaning robot with drive wheels that can control the movement of the drive wheels and the roller brushes to clean the floor according to a stored program. The following further illustrates the technical solution of the present application using a handheld floor scrubber as an example.

[0053] Example 1:

[0054] As shown in Figures 1 to 11, the surface cleaning device of the present invention includes a floor brush 2 that can move across the surface to be cleaned, and a body 1 hingedly connected to the floor brush 2. The rear portion of the floor brush 2 is pivotally connected to the lower portion of the body 1. A handle (not shown) for the user to hold is provided at the upper end of the body 1. The body 1 is provided with a dirt bucket 7 and a dirt suction fan (not shown) for sucking dirty liquid and / or dirt into the dirt bucket 7. The body 1 is also provided with a detachable power source structure. The dirt suction fan and battery pack are disposed within the power source structure. The power source structure is disposed above the dirt bucket and on the same side as the dirt bucket. The floor brush 2 is provided with a dirt suction port 24. The floor brush 2 includes a main floor brush housing 200 consisting of an upper housing 21 and a lower housing 22. The front side 221 of the lower housing 22 is provided with a first flange 222 and a second flange 223 that protrude forward. The dirt suction port 24 is disposed between the first flange 222 and the second flange 223. The upper shell 21 is snapped onto the lower shell 22 to form a accommodating chamber 23. The front side of the bottom of the lower shell 22 is also provided with a floor scraper 28 arranged at a downward angle. The free end of the floor scraper 28 abuts the surface to be cleaned to scoop up solids and / or liquids on the surface to be cleaned during the cleaning process. In this embodiment, the floor scraper 28 is made of rubber. The sewage suction port 24 is provided on the front side 221 of the lower shell 22. A sewage suction hose connected to the sewage suction port 24 is provided in the accommodating chamber 23. The sewage suction hose passes through the rear side of the accommodating chamber 23 and extends upward to connect with the sewage bucket 7. The sewage suction port can be circular or other shapes. In this embodiment, the sewage suction port is rectangular with a height of H and a width of B.

[0055] In this embodiment, the floor brush 2 is also equipped with a roller brush 4 for cleaning the surface to be cleaned, as well as a scraper 5 and comb 6 for cleaning the roller brush 4. The suction port 24, comb 6, and scraper 5 are arranged sequentially in the direction of rotation of the roller brush 4, and the comb 6 and scraper 5 are in contact with the roller brush. In Figure 4, the roller brush 4 rotates in the clockwise direction R indicated by the curved arrow in the figure. The scraper 5 includes a mounting section 51 and a suspended section 52. To improve scraping efficiency, the scraper 5 utilizes a metal scraper. The comb 6 includes a fixed portion 64, comb teeth 61, and a connecting portion 62 connecting the fixed portion and the comb teeth. The mounting section 51 is positioned above the fixed portion 64, with the lower surface of the mounting section 51 in contact with the upper surface of the fixed portion 64. The top surface of the connecting portion 62 at least partially in contact with the suspended section 52, and the front end 521 of the suspended section 52 protrudes forward from the connecting portion 62. The comb teeth 61 are arranged below the connecting portion 62. The comb teeth 61 include a rear tooth surface 617 facing away from the roller brush 4, a front tooth surface 616 facing the roller brush, and a tooth tip 618. The front tooth surface 616 abuts against the roller brush to form a combing surface. The suspended section 52 of the scraping member 5 is tilted downward relative to the horizontal direction. The roller brush 4 is arranged on the front side of the floor brush 2. The floor brush 2 includes a floor brush main body 200. The front side of the floor brush main body 200 is also provided with a roller brush cover 26 covering the roller brush 4. The roller brush cover 26 is detachably mounted on the floor brush main body 200. The floor brush main body 200 includes an upper shell 21 and a lower shell 22. The front side surface 221 of the floor brush main body 200 and the roller brush cover 26 form a roller brush cavity for mounting the roller brush 4. The roller brush 4 includes a roller shaft 40 and a cleaning member. The cleaning member includes a base material 42 and bristles 41. The cleaning member can be fixed to the outer surface of the roller shaft by gluing or other means.

[0056] In this embodiment, the combing surface includes a first end and a second end located between the scraping member 5 and the first end. The deformation of the scraping member 5 abutting the roller brush is greater than the deformation of the first end and the second end abutting the roller brush, and the deformation of the second end abutting the roller brush is smaller than the deformation of the first end abutting the roller brush, so that the entangled material releases pressure at the second end and is peeled off by the scraping member.

[0057] The technical effects of this embodiment are explained below with reference to FIG6 .

[0058] When the roller brush drives the hair strands to rotate, the cleaning element first contacts the first end of the front tooth surface 616 of the comb element. The first end, through the tips of the comb teeth, can preemptively peel off the majority of the hair strands C1 from the cleaning element, thus achieving the first stage of peeling. During this process, a small portion of hair strands C2 may fail to be peeled off in the first stage and pass over the first end and onto the second end. Due to the reduced pressure against the roller brush bristles at the second end, the deformation of the bristles decreases, releasing the pressure on the hair strands C2, causing the hair strands C2 to become loosened or detached from the roller brush. In particular, the front end of the hair strands C2 may break away from the bristles and continue upward with the roller brush to the scraping element. Because the deformation of the scraping element against the roller brush is greater than at the first and second ends, the scraping element deeply presses against the roller brush, blocking and peeling the hair strands C2 from the front end, preventing the hair strands C2 from passing over the scraping element, thus achieving the second stage of peeling. In other words, in this embodiment, the hair strands undergo both the first and second stages of peeling, effectively preventing the hair strands C2 from passing over the scraping element.

[0059] In this embodiment, the connecting portion 62 is in contact with the lower surface of the scraping member 5, and the scraping member 5 extends toward the roller brush over the combing surface. The liquid flow scraped by the scraping member 5 forms a filling area between the connecting portion 62 and the lower surface of the scraping member 5. The liquid flow in the filling area gathers and increases pressure to flush the gaps between the comb teeth. During the rotation of the roller brush, the first end of the combing surface first contacts and squeezes the roller brush. Since the front end of the scraping member 5 is located in front of the tooth tip 618 of the comb teeth 61, the scraping member 5 extends deeper into the bristles, so it further squeezes and scrapes the bristles on the roller brush, so that the dirty liquid in the bristles is squeezed out again, and the dirt that extends into the bristles is scraped off. The dirty liquid squeezed out again carries the stripped dirt, hair and other entanglements and flows downward along the combing surface of the comb tooth member. At this time, the dirty liquid squeezed twice merges to form a larger liquid flow that continues to move downward. Due to the combing surface of the comb tooth member and the scraping member, the dirty liquid flows downward. The gap between the lower surface of the scraping element and the roller brush is small, and this area is partially filled with bristles, so the liquid flow increases in this area. The lower surface of the scraping element and the combing surface of the comb element form a filling area. The comb teeth are at least partially arranged in the filling area. The liquid flows that converge in this area carry dirt, hair and other entanglements into the tooth grooves of the comb teeth and are divided into multiple liquid flows. The water pressure in the tooth grooves increases again instantly, and the flow rate accelerates. The dirty liquid carries dirt, hair and other entanglements and is quickly guided downward by the gaps between the comb teeth and is collected in the dirt suction box or enters the dirt storage bucket through the dirt suction port. Since such a decontamination device is provided on the floor brush of the present invention, the surface cleaning device has a good decontamination effect, especially it will not cause hair and other entanglements to be entangled on the roller brush, and the customer does not need to manually clean the hair and other entanglements on the roller brush, which provides a good customer experience.

[0060] To enhance cleaning efficiency on surfaces, the roller brush's cleaning element is made of a water-absorbing fiber material. A water distributor 8 is located above the scraping element 5. This distributor 8 features a water inlet 81 for supplying cleaning fluid to the roller brush. After absorbing water, the roller brush bristles more effectively wipe away stains on the surface. The lower surface of the scraping element 5 at least partially aligns with the upper surface of the comb element 6, and the upper surface of the scraping element at least partially aligns with the lower surface of the water distributor 8. In one embodiment, the scraping element and comb element may be integral. It will be appreciated that when the roller brush is dry and unwatered, the bristles of the cleaning element are fluffy. At this point, the roller brush has its maximum profile, with the comb teeth and scraping element extending into the bristles. When the roller brush is absorbing water, the bristles of the cleaning element collapse after scraping against the surface, comb teeth, or scraping element, thereby reducing the actual profile of the roller brush to less than the maximum profile but greater than the profile of the roller shaft.

[0061] In this embodiment, the plurality of comb teeth 61 on the comb member 6 are spaced apart along the axial direction of the roller brush. The comb teeth 61 of the comb member 6 at least partially extend into the bristles 41 of the roller brush 4. The comb teeth 61 include a rear tooth surface 617 facing away from the roller brush 4, a front tooth surface 616 facing the roller brush, and a tooth tip 618. The front tooth surface 616 extends from the tooth tip 618 to the lower surface of the scraping member 5, and the tooth grooves between the comb teeth also extend to the lower surface of the scraping member. The first end and the second end are formed on the front tooth surface 616. The deformation of the front tooth surface 616 in contact with the roller brush decreases from the tooth tip 618 toward the scraping member 5. The front tooth surface 616 is the front surface of the comb tooth 61, and the rear tooth surface 617 is the rear surface of the comb tooth 61. Specifically, the front surface can be a curved surface, a flat surface, or a combination thereof.

[0062] To further enhance the removal of entangled objects, in conjunction with Figures 4 and 8 , the comb teeth 61 extend downward and at least partially block the suction port 24. When the surface cleaning device is cleaning the surface to be cleaned, the suction fan operates. Compared to the suction port not blocked by the comb teeth, the effective area of ​​the suction port partially blocked by the comb teeth becomes smaller, and the wind pressure at the suction port increases. Most of the dirty liquid and dirt, as well as entangled objects such as hair, sucked from the surface to be cleaned to the suction port can more easily enter the suction port, thereby achieving the first stage of pressurization. Preferably, at least a portion of the connecting portion 62 also extends downward to at least partially block the suction port 24, and the lower end of the connecting portion 62 is lower than the upper end of the suction port 24, thereby further enhancing the effect of the first stage of pressurization.

[0063] 8 and 9, the comb teeth 61 include a through section 611 and a guide section 612. There is a gap between the two adjacent through sections, which passes through the front tooth surface 616 and the rear tooth surface 617. The gap between the two adjacent through sections 611 forms a slit effect area 613 at the sewage suction port 24 (such as the rectangular dotted box in FIG4 and the elliptical dotted box in FIG8). When the sewage suction fan is working, the wind pressure at the gap increases and the wind speed also increases, while the wind pressure near the sewage suction port not covered by the comb teeth is smaller than that here, so that the suction port 24 is not covered by the comb teeth. An unbalanced airflow is generated at the dirt outlet. Hair and other entangled objects, dirt, and dirty liquid in the gaps between the comb teeth are smoothly sucked into the dirt suction outlet at a faster wind speed under the greater wind pressure of the unbalanced airflow, thereby further improving the dirt suction efficiency. In this way, the second-stage pressurization is achieved, which can better prevent the entangled objects from passing over the scraping parts and avoid the accumulation of hair and solid dirt in the gaps between the comb teeth. In particular, it has a better effect on the stripping and suction of entangled objects, and no dirt or entangled objects will remain on the comb teeth, thus bringing a good experience to customers.

[0064] It should be noted that when a liquid flows in a tube, its flow rate increases when it passes through a narrow area. When air flows through narrow terrain on the ground, it is similar to the flow of liquid in a tube. The flow rate will also increase, and because the gas is compressible, the density will also increase. The effect of this terrain canyon on the airflow is called the "narrow tube effect", also known as the "canyon effect". The slit effect in the present invention is the same as the canyon effect in daily geography. It refers to the wind sucked into the roller brush cavity from between the roller brush and the scraping strip of the floor brush. When it moves to the sewage suction port, it encounters the gap between the comb teeth covering the sewage suction port. Due to the narrow gap, the flow rate of the wind is accelerated when passing through the narrow gap, and the wind pressure increases. The slit effect area of ​​the present invention refers to the area formed by the gap between the two adjacent comb teeth set corresponding to the sewage suction port when the comb teeth partially cover the sewage suction port. For example, if there are 8 comb teeth covering the sewage suction port, there are 7 comb tooth gaps among the 8 comb teeth. The area formed by these 7 gaps is the slit effect area.

[0065] To increase the slit effect area and improve suction efficiency, at least a portion of the comb teeth 61 is higher than the suction port. Specifically, the comb teeth 61 are located in front of the suction port 24, and the tooth grooves between the comb teeth extend to the lower surface of the scraper 5. The top of the front tooth surface 616 is higher than the suction port 24, and the front tooth surface 616 extends downward from the outside of the suction port 24 to at least partially block the suction port 24.

[0066] To further improve the dirt suction efficiency of the slit effect area, a dirt passage is provided between the roller brush and the tooth groove, allowing the entangled materials peeled off by the scraping element and the scraped dirty liquid to flow downward through the dirt passage in the direction of the dotted line indicated by the hollow arrow in Figure 4. As one method of this embodiment, when the roller brush is in a dry and fluffy state without absorbing water, the bristles contact the bottom surface of the tooth groove, thereby blocking the dirt passage; when the roller brush is in a water-absorbing state, the bristles of the cleaning element will fall over after scraping against the surface to be cleaned or the comb teeth or the scraping element, at which point the dirt passage between the outer surface of the roller brush and the bottom surface of the tooth groove is open. As another method of this embodiment, when the roller brush is in a dry and fluffy state without absorbing water, the bristles do not block the dirt passage.

[0067] As shown in Figures 4, 6, and 9, the comb teeth 61 are tilted downward relative to the horizontal plane and extend toward one side of the roller brush 4. The angle between the comb teeth 61 and the horizontal plane is not less than 60°. In this embodiment, the comb teeth have a triangular longitudinal cross-section and have a downwardly inclined front tooth surface 616 and a rear tooth surface 617. The front tooth surface 616 and its extension JK are offset from the outer surface of the roller shaft. As shown in Figure 4, the front tooth surface or the extension JK of the front tooth surface of the comb tooth member 6 is offset from the outer surface of the roller shaft, such that the extension JK passes only through the bristle area. This not only allows the comb teeth to be longer within the maximum profile of the roller brush while maintaining a constant distance between the comb tooth tips and the rotational axis of the roller brush, but also increases the contact area between the comb teeth and the bristles. Furthermore, the pressure between the front tooth surface and the roller brush varies relatively continuously, resulting in more stable pressure release and a more effective removal of entanglements from the roller brush. Furthermore, no obvious tooth marks are produced on the substrate, and the comb teeth do not significantly resist the movement of the roller brush, thereby increasing the life of the bristles and the roller brush's drive motor. Furthermore, the comb teeth cover the suction port for a sufficient length, making it easier to produce a slit effect. This not only helps the surface cleaning device to remove larger debris from the surface to be cleaned, but also creates a stronger slit effect where the comb teeth cover the suction port, thereby generating a stronger suction force, and also achieving a better cleaning and suction effect for a small portion of dirt, dirty liquid, or entangled objects scraped off by the comb teeth and the scraping member.

[0068] Specifically, the front tooth surface 616 is tilted downward from the top 241 of the sewage suction port 24 at an angle γ of 70°≤γ<90°, so that the position of the comb tooth tips tangent to the base material of the roller brush is reasonable, and the comb teeth can extend into the bristles of the base material to a reasonable length, so that the comb teeth can effectively peel off hair and other entanglements on the roller brush without excessively interfering with the base material or even forming tooth marks, which would affect the life of the roller brush. The rear tooth surface 617 is tilted downward from the connecting portion 62, and the rear tooth surface is tilted away from the roller brush. The extended surface of the rear tooth surface intersects or is tangent to the outer surface of the roller shaft, making it easier and smoother for dirty liquid and dirt to move to the vicinity of the sewage suction port, thereby improving the guiding effect.

[0069] In this embodiment, the floor scraper 28 is located below the sewage suction port 24 and forms a sewage suction nozzle 29 between the roller brush 4. The comb teeth are provided with a guide portion facing the sewage suction nozzle. The provision of this guide portion reduces the retention and adhesion of liquid and dirt at the sewage suction port. Most of the liquid and dirt, once moving to the sewage suction port blocked by the comb teeth, can more effectively, quickly, and smoothly pass through the sewage suction port and continue upward into the sewage storage bin, thereby improving sewage suction efficiency. Specifically, the comb teeth 61 include a rear tooth surface 617 facing away from the roller brush 4 and a front tooth surface 616 facing the roller brush. The front and rear tooth surfaces extend obliquely downward from the connecting portion and converge at the tooth tip. The rear tooth surface 617 is inclined toward the sewage suction port 24 and forms the guide portion. In one embodiment, the rear tooth surface 617 of the comb tooth 61 is formed by connecting a first inclined surface 6171 and a second inclined surface 6172. The first inclined surface 6171 is connected to the connecting portion 62. The inclination angle of the first inclined surface 6171 is β, where γ≤β≤90°. Here, the inclination angle β of the first inclined surface 6171 is greater than or equal to the inclination angle of the front tooth surface 616, and the maximum is 90°. The angle between the second inclined surface 6172 and the horizontal plane is θ, so the inclination angle of the second inclined surface is θ, and the inclination angle θ of the second inclined surface 6172 satisfies 30°≤θ≤35°. In this embodiment, the inclination angle of the rear tooth surface 617 refers to the inclination angle θ of the second inclined surface 6172. Therefore, under the guidance of the inclination angle θ of the second inclined surface 6172, the dirty liquid and dirt are more easily and smoothly moved to the vicinity of the suction port. This angle just matches the angle formed by the suction hose from the suction port through the accommodating chamber, from the rear of the accommodating chamber to the upward connection with the suction pipe on the sewage bucket, so the guiding effect is good. The first bevel 6171 effectively blocks and redirects excess liquid flow after passing over the comb teeth 61, particularly when backflow occurs. This is particularly true for liquid flow that is squeezed upwards along the first bevel and then enters the space between the comb teeth and the suction port. This effectively blocks and redirects the liquid flow, allowing it to flush the back of the comb teeth and then redirect back toward the suction port. The arrangement of the first and second bevels creates a buffer and redirection space for the liquid flow, allowing it to more smoothly enter the suction port and flow along the suction port and suction hose to the suction pipe and into the waste container, thereby improving both suction efficiency and the suction effect. In this embodiment, the inclination angle γ of the front tooth surface is 84°, the inclination angle θ of the second bevel is 33°, and the inclination angle β of the first bevel is 90°.

[0070] 4, 8, and 9, the comb teeth 61 protrude downward from the connecting portion 62. The longitudinal cross-section of the comb teeth is triangular or approximately triangular. A guide groove 614 is provided between the two adjacent guide sections 612. The guide groove 614 is provided on the connecting portion. The guide sections 612 are connected as a whole through the connecting portion. That is, the guide groove 614 is provided on the connecting portion 62 between the two adjacent guide sections 612. The guide groove 614 extends upward to the lower surface of the scraping section 5. That is, the guide groove 614 extends from the lower end of the connecting portion 62 to the top of the connecting portion 62. Therefore, the comb teeth 61 extend upward along the front surface of the connecting portion 62 to the top of the connecting portion, and the thickness of the comb teeth gradually decreases to be flush with the front end of the connecting portion. The guide groove 614 is the tooth groove of the two adjacent comb teeth 61. The section from the bottom end of the connecting portion 62 to the tooth tip 618 is the through section. The guide groove 614 is provided corresponding to the gap 613 of the through section 611. The scraper 5 includes a mounting section 51 and a suspended section 52. The mounting section 51 is arranged above the fixed portion 64. The lower surface of the mounting section 51 is fitted with the upper surface of the fixed portion 64. The top surface of the connecting portion 62 is at least partially fitted with the suspended section 52. The front end 521 of the suspended section 52 protrudes forward from the connecting portion 62. A water diverter 8 is arranged above the scraper 5. The mounting section 51 and the fixed portion 64 of the scraper 5 are fitted and clamped between the first protrusion 222 and the lower surface of the water diverter 8.

[0071] 4, 8, and 9, the width of the guide groove is no greater than the gap between the comb teeth, ensuring that a sufficiently large water pressure is generated in the guide groove, so that the dirty liquid can flow downward quickly with the dirt or hair entanglements without getting stuck and adhering here. The equivalent width of the comb teeth 61 is b, 1.4mm≤b≤1.6mm, and the tooth width is reasonable, which not only ensures the contact area between the comb teeth and the cleaning member, thereby ensuring that the dirt or hair entanglements on the cleaning member are peeled off without any residue, but also ensures the number of comb teeth and guide grooves distributed, thereby ensuring that the liquid flow generates sufficient water pressure between the comb teeth, and the generated water pressure is sufficient to be greater than the adhesion of dirt, entanglements or dirty liquid, and the dirt or hair entanglements between the comb teeth are flushed downward, ensuring the effect of removing entanglements such as hair, which is more conducive to the dirt passing through the gap between the comb teeth and entering the sewage suction port. When the comb tooth width b is less than 1.4mm, the comb tooth width is too narrow. Although the comb teeth can enter more bristles to remove hair and other entanglements, the strength of the comb teeth is weakened. At the same time, the scraping surface of the comb teeth per unit length is reduced, which is not conducive to scraping dirt, and the service life is also reduced. At the same time, the comb teeth are too thin, which reduces the life of the bristles. When the comb tooth width b is greater than 1.6mm, the comb tooth width is too wide, and the number of teeth covering the suction port per unit length is reduced. Since hair and other entanglements are thin, there are more bristles in the processing surface of the comb teeth covering the roller brush, and the comb teeth cannot be inserted into each strand of bristles. If the entanglement is close to the middle of the comb teeth instead of at the edge of the comb teeth, it is not easy to be combed and removed. At the same time, the distribution of the comb tooth gap is also reduced, and the water pressure in the comb tooth gap is also insufficient, which reduces the flushing force on the entanglement and is not conducive to the hair entanglement being carried downward by the liquid flow. The comb tooth width in the article refers to the size of the comb teeth in the direction of the roller brush axis. The distance between the gaps 613 of two adjacent comb teeth 61, that is, the spacing, is L, that is, the groove width and the spacing L of the tooth groove are equal, wherein b>L, and the spacing L satisfies 0.7mm≤L<1.5mm, which ensures that the gap between the through sections of the comb teeth covering the sewage suction port is reasonable, and also ensures the area of ​​the slit effect zone, ensuring that sufficient wind pressure can be generated here to enhance the suction force, and the suction force generated is sufficient to be greater than the adhesion force of dirt, entangled objects or dirty liquid, and the clamping force of entangled objects or larger particles clamped in the gap between the two comb teeth, thereby making it more conducive to the dirt to pass smoothly through the gap between the comb teeth into the sewage suction port. The height of the through section 611 covering the sewage suction port 24 is h, where 0.7mm<h≤3.5mm, which ensures that the length of the through section covering the comb teeth at the sewage suction port is sufficient to increase the wind pressure of the through section covering the sewage suction port, so that the suction force generated by the increased wind pressure is sufficient to resist the adhesion force of dirt, entangled objects or dirty liquid in the gap, and the clamping force of entangled objects or larger particles clamped in the gap between the two comb teeth, thereby making it easier for dirt to pass through the gap between the comb teeth and enter the sewage suction port.In this embodiment, L=1.2mm, h=3mm. The comb teeth formed by this scheme have a reasonable length. The point where the tooth tip 618 is tangent to the base material 42 of the roller brush 4 is also slightly farther away from the rotation center axis of the roller brush, that is, the tooth tip of the comb teeth can contact the base material earlier, and the stripping effect of the entanglements on the roller brush is better. The comb teeth extend into the bristles for a long time, and the contact area between the comb teeth and the bristles is large. No obvious tooth marks will be produced on the base material, and the comb teeth will not pose much resistance to the movement of the roller brush. In addition, the length of the comb teeth covering the suction port is sufficient, and it is easier to produce a slit effect. It is not only beneficial for the surface cleaning device to suck away larger garbage from the surface to be cleaned, but also a strong slit effect can be formed at the place where the comb teeth cover the suction port, thereby generating a strong suction force, and the cleaning and suction effect of a small part of the dirt, dirty liquid or entanglements scraped off by the comb teeth and the scraping member is also better.

[0072] The thickness of the comb teeth gradually decreases from bottom to top, and the tooth grooves gradually become shallower from bottom to top, which enhances the diversion effect. At the same time, the comb teeth can better extend into the bristles and produce less resistance to the movement of the roller brush. The tooth grooves are shallower near the scraping element. Since the water pressure and negative pressure here are the lowest, the tooth grooves are shallow, and there is less space for dirty liquid or dirt to accumulate, so that dirty liquid or dirt will not accumulate in large quantities here. The bottom surface of the tooth groove is an arc surface, and the center of the arc surface is located on the side where the roller brush is located. With this structure, the diversion effect is better, and the dirty liquid or dirt flows more smoothly in the tooth grooves, and the chance of accumulation is reduced.

[0073] Furthermore, an acute angle α is formed between the overhanging portion 52 of the scraping member 5 and the front tooth surface 616. By setting this acute angle α between the overhanging portion and the front tooth surface, the overhanging portion can better apply the peeling force to the front end of the entangled material in the pressure release zone, while maintaining a certain angle between the front tooth surface and the roller brush, thereby better preventing the entangled material from passing over the scraping member, thereby achieving secondary peeling. Specifically, the extension surface of the overhanging portion is configured to pass through the center of the roller brush.

[0074] In this embodiment, the mounting section 51 is positioned above the central axis of the roller brush 4. A transition section 53 is provided between the mounting section 51 and the suspended section 52. The suspended section 52 is tilted downward along the diameter of the roller brush 4 and abuts against the substrate, allowing the transition section 53 to smoothly connect the mounting section 51 and the suspended section 52. The fixed portion 64 of the comb member 6 is positioned in contact with the mounting section. The suspended section 52 is at least partially positioned above the comb teeth 61. The front end 521 of the suspended section 52 of the scraping member 5 is located in front of the tooth tips 618 of the through section 611. Because the comb teeth 61 and the guide groove 614 extend upward into the scraping member 5, the front surface of the comb member 6 includes the front tooth surfaces 616 of the comb teeth 61 and the guide groove 614. Therefore, in this embodiment, the front tooth surfaces 616 of the comb teeth, the guide groove 614, the lower surface of the scraping section 5, and the outer surface of the roller brush 4 form a negative suction pressure zone 500.

[0075] The entire working process of the technical solution of the present invention is explained below in combination with the above-mentioned contents.

[0076] When the surface cleaning device is cleaning, the clean water tank supplies water to the roller brush or the surface to be cleaned, the water enters the water supply port on the floor brush from the water dividing piece, and flows out to the roller brush through the water supply port, the roller brush is wetted, and the roller brush rotates to clean the surface to be cleaned, and at the same time the sewage suction fan is started, the floor scraper scoops up the dirt and dirty liquid on the surface to be cleaned, and under the influence of the rotation of the roller brush, the gap between the floor scraper and the roller brush forms a sewage suction nozzle, and under the influence of the rotation of the roller brush, the scooped dirt and dirty liquid are sucked into the suction nozzle, and the mixed dirt behind the suction nozzle is discharged. Guided by the inclined rear tooth surfaces of the comb teeth and after the first stage of pressurization, the brush moves toward the suction port and enters the suction port. At this time, some of the dirty liquid and dirt are absorbed by the bristles or driven upward with the roller brush. The comb teeth that extend into the roller brush bristles first perform the first stage of stripping of the entangled objects at the tooth tips, stripping and scraping off the dirt, hair and other entanglements on the roller brush. The roller brush continues to rotate through the slit effect area, and under the action of the suction fan, the second stage of pressurization is performed to remove the entanglements, which can also be sucked away most of the entanglements. The roller brush then carries a small amount of uncleaned entanglements to the scraper, where the entanglements are stripped in the second stage at the second end and the scraper. Such a surface cleaning device can clean dirt, dirty liquid, hair and other entanglements on the surface to be cleaned more thoroughly, and can also keep the roller brush cleaner, so that the roller brush is also cleaner every time it contacts the surface to be cleaned, and no secondary pollution will be generated. The structure of the comb teeth cooperates with the scraping piece to effectively peel off hair and other entanglements, thereby avoiding hair and other entanglements from being entangled on the roller brush. At the same time, the suction effect of hair and other entanglements is significantly improved, and the suction efficiency is high, thereby greatly improving the overall cleaning effect of the surface cleaning device and improving the cleaning efficiency.

[0077] In this embodiment, the sewage suction fan and the battery pack are installed in a shell to form an independent power source, and the power source is detachably mounted on the fuselage. An air inlet duct and an air outlet duct are provided on the shell of the power source corresponding to the sewage suction fan. The air inlet duct is connected to the sewage bucket on the fuselage. The sewage bucket is detachably mounted on the fuselage. A limiting surface for limiting the barrel wall of the sewage bucket is provided on the fuselage. A gap is formed between the limiting surface and the sewage bucket. An exhaust port is provided on the fuselage. The air outlet duct is connected to the inside of the fuselage to discharge the air discharged by the sewage suction fan through the exhaust port provided on the fuselage. The exhaust port is connected to the limiting surface and the sewage bucket to form a gap, so that the air is discharged from the fuselage through the gap between the two.

[0078] Of course, it is understood that the suction fan and battery pack can also be installed inside the body; the clean water tank can also be installed on the floor brush and located in the accommodating cavity. The bottom surface of the tooth groove can be a downwardly convex curved surface, and the connecting portion 62 is not lower than the suction port 24, as shown in Figure 11. Such technical solutions that do not depart from the concept of the present invention are also within the scope of protection of the present invention and are not further exemplified here.

[0079] Example 2:

[0080] As shown in Figures 12 to 16, the differences between this embodiment and the first embodiment include: the roller brush in this embodiment is a crawler-type structure. Specifically, the roller brush 4 includes a roller shaft 40 and a cleaning member. The roller shaft includes a first rotating roller 44, a second rotating roller 45, and a support frame 46 connecting the first rotating roller 44 and the second rotating roller 45. The cleaning member is mounted on the outer surfaces of the first rotating roller 44 and the second rotating roller 45. The first rotating roller is positioned at the rear of the floor brush and close to the sewage suction port, while the second rotating roller is positioned at the front of the floor brush and away from the sewage suction port. The first rotating roller 44 and the second rotating roller 45 have equal diameters, and the scraping member 5 is positioned above the rotation axis of the first rotating roller 44. In one embodiment, the diameter of the first rotating roller 44 is larger than that of the second rotating roller 45.

[0081] As the surface cleaning device described in the present invention, the mounting section 51 of the scraping member 5 is arranged above the central axis of the roller brush 4, the extension surface of the suspended section 52 is higher than the rotation center axis of the roller brush, the connecting portion 62 of the comb tooth member 6 is arranged in contact with the mounting section, and the suspended section 52 is at least partially arranged above the comb teeth 61. The comb tooth member 6 includes a connecting portion 62 extending from the comb teeth 61 to the lower surface of the scraping member, that is, a connecting portion 62 is provided between the scraping member 5 and the comb teeth 61, and the comb teeth 61 and the connecting portion 62 form a combing surface that abuts the roller brush, and the first end and the second end are formed on the combing surface. The comb teeth 61 include the through section 611 and the guide section 612 as described in Example 1. The comb teeth include a front tooth surface 616, and the front tooth surface 616 forms the first end. The connecting portion includes a drainage surface 621, and the drainage surface forms the second end.

[0082] Compared to the approach in Example 1, this embodiment utilizes the drainage surface and the front tooth surface to form the combing surface of the comb element. This creates a more continuous and smooth space between the drainage surface and the lower surface of the scraping element, preventing larger solid particles from becoming stuck in this space. Furthermore, the area of ​​entanglement pressure relief at the second end is larger, allowing entanglements along the entire axial direction of the roller brush to be removed by the second stage, further enhancing the entanglement removal effect.

[0083] The combing surface extends obliquely toward the roller brush. The roller brush comprises a roller shaft and a cleaning member. The combing surface and its extended surface are separated from the outer surface of the roller shaft.

[0084] In this embodiment, the combing surface of the comb member 6 includes a drainage surface 621 formed by the front surface of the connecting portion 62 and the front tooth surface 616 of the comb teeth 61. The drainage surface 621 and the front tooth surface 616 together form the combing surface of the comb member. The comb teeth 61 are not higher than the suction port 24. The through section 611 is arranged below the comb teeth 61. Because the tooth groove does not extend to the bottom surface of the scraping member, the connecting portion 62 of the comb member 6 extends forward to above the comb teeth 61 and abuts against the suspended section 52 of the scraping member 5. The comb teeth and the suspended section 52 of the scraping member 5 are connected by the connecting portion 62. The front surface of the connecting portion 62 forms a drainage surface that guides the liquid flow downward. Therefore, the area between the lower surface of the scraping member 5, the front surface of the comb member 6, the guide groove 614 and the outer surface of the roller brush forms a leeward area that is impassable to airflow, forming a negative suction pressure zone 500. The suction negative pressure area of ​​this embodiment is formed by the lower surface of the suspended section 52, the drainage surface 621, the front tooth surface 616 of the comb teeth 61, and the gap between the bottom surface of the guide groove 614 and the outer surface of the roller brush. The liquid flow formed by the dirty liquid squeezed and scraped off by the scraper passes through the drainage surface, carrying the dirt and / or entanglements peeled off from the roller brush by the scraper to the comb teeth, and then is diverted by the guide groove. Since the drainage area and the guide groove are leeward areas where air cannot pass through, a suction negative pressure area is formed. Therefore, the water pressure of the liquid flow in the drainage area is increased. When passing through the narrow area of ​​the guide groove, a narrow tube effect occurs, so the water pressure increases instantly, accelerating the liquid flow carrying dirt and / or entanglements to flow through the guide groove of the guide section, and smoothly enter the gap of the through section, forming a narrow slot effect between the gaps of the comb teeth at the corresponding sewage suction port. Therefore, a narrow slot effect area is formed between the gaps of the comb teeth at the corresponding sewage suction port. Under the action of the sewage suction fan, the wind pressure in the narrow slot effect area increases, the wind speed accelerates, and thus the suction force increases, and the liquid flow carries the dirt and / or entanglements to the narrow slot effect area and is quickly sucked into the sewage suction port.

[0085] Of course, it is understandable that we can also use a comb member such as the one shown in Figure 15, where the top of the comb teeth is higher than the top of the sewage suction port. As shown in Figure 16, the top of the comb teeth, or the bottom of the tooth grooves of the comb teeth, is flush with the top of the sewage suction port. The other structures and beneficial effects of this embodiment are consistent with those of the first embodiment and will not be repeated here.

[0086] Example 3:

[0087] As shown in Figures 17 to 19, the difference between this embodiment and the first embodiment is that the comb tooth structure adopts the comb tooth structure of the second embodiment.

[0088] In this embodiment, the roller brush 4 includes a hollow roller 43 and a cleaning member covering the outer surface of the roller 43, and the cleaning member includes bristles 41 and a cleaning member 42. In this embodiment, a transition section 53 is further provided between the mounting section 51 and the suspended section 52. The mounting section 51 is provided above the central axis EF of the roller brush 4, and the suspended section 52 is provided to coincide with the central axis EF of the roller brush. The connecting portion 62 of the comb tooth member 6 is provided in contact with the mounting section, and the transition section 53 smoothly connects the mounting section 51 and the suspended section 52. The suspended section 52 is at least partially provided above the comb teeth 61. The suspended section 52 is located above the central axis EF of the roller brush 4 and is provided parallel to the central axis EF of the roller brush 4. The lower end of the connecting portion 62 is lower than the upper end of the sewage suction port 24 so that the comb teeth 61 at least partially block the sewage suction port 24. The lower end of the connecting portion 62 between the two adjacent guide sections 612 is provided with a guide groove 614. The through section 611 is provided at the lower part of the comb teeth 61. Since the tooth groove, i.e., the guide groove 614, does not extend to the scraping member, but extends to the combing surface of the comb tooth member, that is, the comb teeth 61 are not all provided on the combing surface of the comb tooth member 6, but the connecting portion 62 of the comb tooth member 6 extends forward to the top of the comb teeth 61 and is connected to the suspended section 52 of the scraping member 5. The comb teeth are connected to the suspended section 52 of the scraping member 5 by a connecting portion 62, and the front surface of the connecting portion 62 forms a drainage surface 621 that guides the liquid flow downward. Therefore, the combing surface of the comb tooth member 6 in this embodiment includes the drainage surface 621 formed by the front surface of the connecting portion 62, the front tooth surface 616 of the comb teeth 61, and the bottom surface of the guide groove 614. The area between the partial lower surface 54 of the scraping member 5, the combing surface of the comb tooth member 6, the guide groove 614 and the outer surface of the roller brush forms a leeward area that the airflow cannot pass through, and this area forms a suction negative pressure area 500. The suction negative pressure area of ​​this embodiment is formed by the gap between the lower surface 54 of the suspended section 52, the drainage surface 621, the front tooth surface 616 of the comb teeth 61, the bottom surface of the guide groove 614 and the outer surface of the roller brush. The liquid flow formed by the dirty liquid squeezed and scraped off by the scraper passes through the drainage surface 621, and is washed to the comb teeth by the dirt and / or entanglements peeled off from the roller brush by the scraper, and then is diverted by the guide groove. Since the drainage area and the guide groove are leeward areas where air cannot pass through, a suction negative pressure area is formed. Therefore, the water pressure of the liquid flow in the drainage area is increased. When passing through the narrow area of ​​the guide groove, a narrow tube effect is generated, so the water pressure increases instantly, and a filling area is formed at the same time, which accelerates the liquid flow to carry the dirt and / or entanglements through the guide groove of the guide section and smoothly enter the gap of the through section, forming a slit effect between the gaps of the comb teeth at the corresponding sewage suction port. Therefore, a slit effect area is formed between the gaps of the comb teeth at the sewage suction port. Under the action of the sewage suction fan, the wind pressure in the slit effect area increases, the wind speed increases, and the suction force is increased. The liquid flow carries the dirt and / or entanglements to the slit effect area and is quickly sucked into the sewage suction port.

[0089] In this embodiment, as shown in Figure 19, the rear tooth surface 617 is arranged to be tilted downward along the connecting portion 62, and the angle between the rear tooth surface and the horizontal plane is θ, where θ is the inclination angle of the rear tooth surface, 30°≤θ≤35°. Under the guidance of the inclination angle θ of the rear tooth surface, the dirty liquid and dirt can move more easily and smoothly to the vicinity of the sewage suction port, so that the dirty liquid and dirt can enter the sewage suction port more smoothly and move along the sewage suction port and the sewage suction hose to the sewage suction pipe and enter the sewage bucket, which not only improves the suction efficiency but also improves the sewage suction effect. In this embodiment, the tooth width b of the comb teeth is 1.5 mm, and the spacing L between the two comb teeth is 1 mm, which ensures that the gap between the through sections of the comb teeth covering the sewage suction port is reasonable, thereby ensuring the area of ​​the slit effect zone, and ensuring that sufficient wind pressure can be generated here to enhance the suction force. The suction force generated is sufficient to be greater than the adhesion force of dirt, entangled objects or dirty liquid, and the clamping force of entangled objects or larger particles clamped in the gap between the two comb teeth, thereby making it easier for dirt to pass through the gap between the comb teeth and enter the sewage suction port. The height of the comb teeth covering the sewage suction port downward is h=1mm. The comb teeth formed by this scheme are relatively small, so no obvious tooth marks will be produced on the cleaning member, and the movement resistance of the roller brush is also relatively small. Moreover, the comb teeth are long enough to extend into the bristles to handle entanglements, and the length covering the sewage suction port is also relatively small. Therefore, there is little obstacle for the surface cleaning device to suck away larger dirt from the surface to be cleaned. Not only can it handle larger garbage on the surface to be cleaned, but it can also form a certain slit effect at the sewage suction port, and the cleaning and suction effect of a small part of the dirt or dirty liquid or entanglements scraped off by the comb teeth and the scraping member is also better.

[0090] Example 4:

[0091] As shown in FIG20 , the differences between this embodiment and the aforementioned embodiments 1, 2, and 3 include:

[0092] The dirt container 7 is mounted on the floor brush 2 and includes a dirt chamber 71 and a dirt inlet 72. The dirt inlet 72 is positioned below the comb member 6 and the scraper 5. This allows entangled materials, dirty liquid, and dirt removed by the comb member and the scraper 5 during rotation to fall into the dirt container under the action of gravity. Specifically, the dirt container 7 can be detachably mounted on the floor brush 2 to facilitate removal for cleaning.

[0093] As an implementation of this embodiment, the comb teeth member 6 and the scraping member 5 are arranged on the roller brush cover 26, so that the comb teeth member and the scraping member can be disassembled and cleaned together with the roller brush cover.

[0094] It can be understood that the roller brush in this embodiment can also adopt the crawler-type roller brush structure as in the second embodiment.

[0095] It is easy for those skilled in the art to understand that the scope of protection of this application is not limited to the above-mentioned preferred embodiments. Without departing from the technical principles of this application, those skilled in the art may split and combine the technical solutions in the above-mentioned preferred embodiments, and may also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of this application will fall within the scope of protection of this application.

Claims

1. A surface cleaning device, comprising a floor brush, wherein the floor brush is provided with a roller brush, a scraping member and a comb tooth member having a plurality of comb teeth, wherein the comb tooth member and the scraping member are both in contact with the roller brush, wherein: The comb tooth member includes a combing surface abutting against the roller brush, and the combing surface includes a first end and a second end located between the scraping member and the first end. The deformation amount of the scraping member abutting against the roller brush is greater than the deformation amount of the first end and the second end abutting against the roller brush, and the deformation amount of the second end abutting against the roller brush is less than the deformation amount of the first end abutting against the roller brush, so that the entangled material releases the pressure at the second end and is peeled off by the scraping member.

2. The surface cleaning device according to claim 1, characterized in that Tooth grooves are arranged between adjacent comb teeth, and the tooth grooves extend to the lower surface of the scraping member. The comb teeth include front tooth surfaces abutting against the roller brush, and the front tooth surfaces of the comb teeth form the combing surfaces.

3. The surface cleaning device according to claim 1, characterized in that The comb tooth member includes a connecting portion extending from the comb teeth to the lower surface of the scraper member, the connecting portion has a drainage surface, the comb teeth include a front tooth surface abutting against the roller brush, and the drainage surface of the connecting portion and the front tooth surface of the comb teeth together form the combing surface.

4. The surface cleaning device according to claim 3, characterized in that The front tooth surface forms the first end, and the drainage surface forms the second end.

5. The surface cleaning device according to claim 1, characterized in that The combing surface is inclined and extends toward the roller brush. The roller brush comprises a roller shaft and a cleaning member. The combing surface and its extended surface are separated from the outer surface of the roller shaft.

6. The surface cleaning device according to any one of claims 1 to 5, characterized in that: It includes a sewage suction fan, and the floor brush is also provided with a sewage suction port connected to the sewage suction fan. The scraping member and the comb tooth member are arranged above the sewage suction port in sequence from top to bottom, and the comb teeth extend downward to at least partially cover the sewage suction port.

7. The surface cleaning device according to claim 6, characterized in that The comb teeth include through sections, and gaps are arranged between the through sections to form a slit effect area between the sewage suction port and the roller brush.

8. The surface cleaning device according to claim 7, characterized in that The comb teeth are not higher than the dirt suction port, the penetration section is arranged at the lower part of the comb teeth, and the tooth grooves between the comb teeth are at a distance from the bottom surface of the scraping member.

9. The surface cleaning device according to claim 6, characterized in that The floor brush is also provided with a floor scraper bar in contact with the surface to be cleaned, a dirt suction nozzle is formed between the floor scraper bar and the roller brush, the comb tooth member is arranged on the top wall of the dirt suction nozzle, the comb tooth member is provided with a guide portion facing the dirt suction nozzle, and the rear tooth surface is inclined toward the direction of the dirt suction nozzle and at least partially forms the guide portion.

10. A surface cleaning device, comprising a floor brush with a roller brush, wherein the floor brush is provided with a decontamination device abutting against the roller brush, wherein the decontamination device comprises a scraping member and a comb member located below the scraping member, wherein: The comb tooth member is provided with a plurality of comb teeth and a connecting portion extending from the comb teeth to the lower surface of the scraping member, the connecting portion abuts against the lower surface of the scraping member, the comb teeth and the connecting portion form a combing surface, the combing surface abuts against the roller brush, the scraping member extends in the direction of the roller brush over the combing surface, the liquid flow scraped by the scraping member gathers between the connecting portion and the lower surface of the scraping member to form a filling area, the liquid flow in the filling area gathers and is pressurized to flush the gaps between the comb teeth.

11. The surface cleaning device according to claim 10, characterized in that A guide groove is provided at the lower part of the connecting part, and the guide groove is connected to the gap between the comb teeth. The front surface of the connecting part, the guide groove and the lower surface of the scraping member form the filling area.

12. The surface cleaning device according to claim 10, characterized in that The connecting portion is provided with a guide groove, which extends upward to the lower surface of the scraper and downward to the gap between the comb teeth. The guide groove and the lower surface of the scraper form the filling area.

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